JPH0322263A - Optical disk device - Google Patents

Abstract

PURPOSE:To execute data processing at high speed by providing plural optical head driving parts to respectively move optical heads and plural signal processing circuits to input recording and reproducing data and executing the recording and reproducing of the data. CONSTITUTION:At the time of recording, a host computer 3 commands a signal processing circuit 5 to record the data of 32K bytes from the 0 sector of an n+32 track to the 15 sector of an n+33 track and the data of 32K bytes in a 9th block B9 are successively inputted. Then, an optical head 13 is moved to the n+32 track and the data are recorded to an optical disk 1. Next, when the data of the disk 1 are reproduced, the computer 3 commands a CPU 16 and a signal processing circuit 4 to reproduce the data from the 0 sector of an m-track to the 15 sector of m+16 track and commands the signal processing circuit 5 to reproduce the data from the 0 sector of the m+16 track to the 15 sector of an m+17 track. Then, a signal processing circuit 6 is commanded to reproduce the data from the 0 sector of an m+32 track to the 15 sector of an m+25 track. Thus, the data are reproduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical disc device for recording and reproducing data on an optical disc.

[Conventional technology]

Currently, optical discs used as information recording media include CD.
There are CD-ROMs, write-once optical discs, rewritable optical discs, and the like.

These optical disks have a large data storage capacity and are expected to be used as external storage devices for personal computers and the like.

[Problem to be solved by the invention]

However, since current optical disk devices are inferior to hard disks in data transfer speed, overwriting, and access speed, it is difficult for them to become mainstream as external storage devices for personal computers. The reason why the data transfer speed of an optical disk is so slow is thought to be because the access speed is slow and error correction takes time, and also because the rotation speed of the optical disk is slow. Therefore, there is a problem in that in order to increase the access speed, it is necessary to reduce the weight of the optical head.

On the other hand, there is a problem in that in order to increase the rotational speed of the optical disk, it is necessary to increase the output of the semiconductor laser.

In view of these problems, it is an object of the present invention to provide an optical disk device that can obtain a high data transfer speed without reducing the weight of the optical head or increasing the output of the semiconductor laser.

[Means to solve the problem]

An optical disc device according to the present invention records and reproduces data on an optical disc, and includes a plurality of optical heads that project light beams onto the optical disc, a plurality of optical head drive units that individually move the optical heads, and a plurality of optical head drive units that individually move the optical heads. It is connected to an optical head and includes a plurality of signal processing circuits that input data for recording and reproduction. When recording data on an optical disk, the data to be recorded is divided and the divided data is transmitted to the plurality of signal processing circuits. The data is divided and sequentially transferred to a signal processing circuit, and the optical head drive section moves a plurality of optical heads to a required recording position on the optical disk to record data.
When reproducing data from an optical disc, an optical head drive unit moves multiple optical heads to the desired playback position on the optical disc to simultaneously reproduce the data on the optical disc, and transfers it to multiple signal processing circuits to reproduce the reproduced data. It is characterized by being a precept to obtain.

[Function] The plurality of optical heads project light beams to a plurality of positions on the optical disk. The optical head drive section moves each of the plurality of optical heads separately. The plurality of signal processing circuits transfer the transferred recording data to an optical head connected to the signal processing circuit, and also simultaneously capture reproduction data reproduced by the plurality of optical heads from the optical disk.

This allows a large amount of data to be transferred to the optical disc, reducing the time it takes to record and reproduce data.

〔Example〕

The present invention will be described in detail below with reference to drawings showing embodiments thereof.

FIG. 1 is a block diagram showing the main parts of an optical disc device according to the present invention. The optical disc 1 is rotationally driven by a motor 18 driven by a motor drive circuit 19. On one side of the optical disc 1, there are a plurality of (four in FIG. 1) linear motors 8, 9, which are optical head drive units whose length direction is the radial direction of the optical disc 1.
10. 11 are arranged radially, and each is arranged at an appropriate distance from one surface of the optical disc 1. And these linear motors 8, 9, 10. 11, the optical head 12.13.14. 15 can be moved individually in the radial direction of the optical disc l. Optical heads 12, 13. 14. 15 projects a light beam in the direction of one surface of the optical disc 1.

Said linear motor 8, 9. 10. 11 and the motor drive circuit 19 includes a CP for controlling the optical disc device.
A control signal for driving is given from 016. In addition, the CPU 16 has a host computer 3.
Read commands and write commands are given from . Each optical hand 12. 13.14
．． 15 and the respective signal processing circuits 4, 5, 6.7 are configured such that signals can be input/output between them separately. 5, 6. 7 is also capable of outputting signals between it and the host computer 3 via a data path DB. Each signal processing circuit 4.5.6.7 has signal modulation, demodulation, error correction, and interface functions between the host computer 3 and the optical disc 1.

FIG. 2 is a schematic diagram of the optical disc 1 applied to the optical disc device of the present invention. One track of the optical disk 1 is divided into 16 sectors, and the sector 1 is formed by an address section IA and a data section 1D.

FIG. 3 shows a conceptual diagram of an example of a data group stored in the host computer 3 or the optical disk 1.
It is made up of 32 blocks.

Next, the operation of the optical disc device configured as described above will be explained with reference to FIGS. 1, 2, and 3.

When data is to be recorded on the optical disk 1, it is assumed that the data shown in FIG. 3 is stored in the host computer 3, the data group consists of 32 blocks, and the data amount of one block is 32 Kbytes. Furthermore, the amount of data that can be recorded in one sector of the optical disc l is IK bytes. As an example of data recording, consider a case where data of the host computer 3 (see FIG. 3) is recorded on the optical disc 1, for example, from sector 0 of track n to sector 15 of track n+63.

The host computer 3 first gives the CPU 16 and the signal processing circuit 4 a write command that instructs the CPU 16 and the signal processing circuit 4 to record 32K bytes of data from the O sector of the n trunk to the 15 sector of the n+1 track of the optical disk l, and then The 32K byte data of block B1 is manually input one by one. Thereby, the signal processing circuit 4 adds an error correction signal to the input data, formats the data for the optical disk, and supplies the data to the optical head 12. At this time, the optical head l2 is moved to n tracks by the linear motor 8 in response to a write command given to the CPU 16, and data encoded by the signal processing circuit 4 is recorded on the optical disc 1. At this time, since the data transfer rate from the signal processing circuit 4 to the optical disk l is extremely slower than the data transfer rate from the host computer 3 to the signal processing circuit 4, the host computer 3 transfers the 0 sector of the n+32 trunk to the signal processing circuit 5. A write command is given to instruct the recording of 32K bytes of data from sector n+33 to the 15th sector of the trunk, and the 32K data of the 9th block B9 shown in Figure 3 is given.
Input the byte data sequentially, and also move the optical head 13 to n.
+32 trunk and record data on the optical disc 1.

In this way, when the host computer 3 records data, the CPU 16 and the signal processing circuits 4, 5 are sequentially connected to each other.
, 6.7, continue to manually write write commands and data. Then, the signal processing circuit 6 has the 17th block B17.
Continue inputting the 32K byte data of the 25th block B25 to the signal processing circuit 7,
When the data processing of the signal processing circuit 4 is completed, the data of the second block B2 is manually input. In addition, other signal processing circuits 5
．． When the data processing in 6.7 is completed, the 10th block BI0. 18th block 818. The data of the 26th block B26 is input separately. Then, by repeating such operations, the data stored in the host computer 3 is recorded onto the optical disc 1.

Next, when data on the optical disc 1 is to be reproduced, it is assumed that the data group shown in FIG. 3 is continuously recorded on the optical disc 1 from the O sector of the m track to the 15 sectors of the m+63 track. The host computer 3 first uses C
A read command is sent to the P0 16 and the signal processing circuit 4 to reproduce data from the O sector of the m trunk to the 15 sector of the m+1 trunk, and the signal processing circuit 5 is sent a read command to the signal processing circuit 5.
16 tracks O sector to m+171-15 racks
The signal processing circuit 7 receives a read command that instructs the reproduction of data up to the sector, and a read command that instructs the signal processing circuit 6 to reproduce the data from the O sector of the m+32} rack to the 15th sector of the m+25} rack. m+48
}A read command instructing the reproduction of data from sector 0 of the rack to sector 15 of track m+49 is inputted to each optical head 12, 13. 14. 15
Linear motor 8. 9, 10. 11, each track is moved to its respective data playback position, and the data of each track is played back simultaneously. The reproduced data is input to signal processing circuits 4, 5, 6.7. host computer 3
takes in the data input to the signal processing circuits 4.5, 6.7, and when the reading is finished, gives the next read command again to each of the signal processing circuits 4, 5, 6.7.

By repeating such operations, the host computer 3 organizes the data reproduced from the optical disk and obtains reproduced data.

As mentioned above, the data group is as shown in Figure 3.
They are sent to the signal processing circuit 4 in the order of Bl, B2...B8.
, B9, BIO...B16 in this order to the signal processing circuit 5, B17, 81B...824 in this order to the signal processing circuit 6, B25. B26...B32
They were input into the signal processing circuit 7 separately in the order of Bl. B5, B9...
- Send them to the signal processing circuit 4 in the order of B29, B2, B
6. BIO...B30 are sent to the signal processing circuit 5, B3, B7, Bll...B31 are sent to the signal processing circuit 6, B4, 8B... B12...B3
They may be respectively input to the signal processing circuit 7 in the order of 2.

When four optical heads and four signal processing circuits are used, as in the optical disk device constructed in this way,
Compared to a conventional optical disk device using a single optical head and a single signal processing circuit, the data transfer speed between the optical disk and the signal processing circuit is four times faster, that is, the data transfer time is reduced to A. I can do it.

Note that in this embodiment, four sets of optical heads and four signal processing circuits are used, but the number is an example and is not limited thereto.

〔Effect of the invention〕

As described in detail above, the optical disc device of the present invention includes a plurality of optical heads, a plurality of optical head drive units that move the optical heads individually, and a plurality of signal processing circuits that input data for one recording and reproduction. Since data is recorded and reproduced using the optical disc, the data transfer time between the optical disk and the signal processing circuit during data recording and reproduction can be significantly reduced. Therefore, the present invention has the excellent effect of providing an optical disc device that can process data at high speed.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the main parts of an optical disc device according to the present invention, FIG. 2 is a schematic diagram of an optical disc, and FIGS. 3 and 4 are conceptual diagrams of data groups. ■...Optical disk 3...Host computer 4,
5, 6.7...Signal processing circuit 8. 9. to,
11... Linear motor 12, 13, 14.15.
...Optical Hesode 16...CPtl 1B...Motor Patent Applicant Sanyo Electric Co., Ltd.

Claims (1)

[Claims] 1. An optical disc device for recording and reproducing data on an optical disc, comprising: a plurality of optical heads that project light beams onto the optical disc;
In the case of recording data on an optical disc, it is equipped with a plurality of optical head drive units that move the optical heads separately, and a plurality of signal processing circuits that are connected to the optical heads and input data for recording and reproduction. , the data to be recorded is divided, the divided data is divided and sequentially transferred to the plurality of signal processing circuits, and the plurality of optical heads are moved to required recording positions on the optical disk by the optical head drive section to record the data. If you want to record and play back data from an optical disc,
The optical head driving section moves a plurality of optical heads to a required playback position on an optical disk to simultaneously play back data on the optical disk, and transfers the data to a plurality of signal processing circuits to obtain playback data. optical disk device.